Hinge pin stop



FIG. 1 is a top view of a hinge pin stop showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a perspective view thereof;

FIG. 6 is a reduced perspective view thereof, the hinge being shown in broken lines for illustrative purposes only. 

The ornamental design for a hinge pin stop, as shown and described. 